By using a field-effect transistor configuration, we have demonstrated that it is possible to dope electrons or holes into an initially underdoped YBa2Cu3O7-x film at room temperature. The results of systematic measurements of the dual-type transconductance indicate comparable field-effect mobilities for electrons and holes. We propose a model based on band bending and localized electronic states within the band gap of the Mort insulator to explain the dual-type charge transport.
|Number of pages||5|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 1 Sep 2000|